Download - Gas-Insulated Switchgear GMA

Gas-Insulated Switchgear

No. AGS 531 521-01

Edition 03/2009

www.schneider-electric.com

GMAGas-Insulated Switchgear up to 24 kV

Operating Instructions

Manufacturer:

Schneider Electric Sachsenwerk GmbH Rathenaustrasse 2 D-93055 Regensburg Germany ( +49 (0) 9 41 46 20-07 +49 (0) 9 41 46 20-418

Service:

Schneider Electric Sachsenwerk GmbH Rathenaustrasse 2 D-93055 Regensburg Germany ( +49 (0) 9 41 46 20-07 +49 (0) 9 41 46 20-418

GMA

3AGS 531 521-01 | Edition 03/2009

Remarks on this manual .............................................................................5Purpose and target group ........................................................................................... 5Reference documents ................................................................................................ 5Terms and symbols used ............................................................................................ 5Any questions or suggestions?................................................................................... 5

1 Safety provisions ..............................................................................6

2 Technical data ....................................................................................72.1 Nameplate ....................................................................................................... 72.3 Technical data for electrical control and operating devices ............................ 82.4 Utilization in line with the intended purpose .................................................... 92.5 Applied standards ......................................................................................... 102.6 Environmental and operating conditions ........................................................112.7 Disposal after the end of the service life ........................................................11

3 Variants overview ............................................................................12

4 Insulating gas monitoring ..............................................................144.1 Gas compartment diagram ............................................................................ 144.2 Technical data ............................................................................................... 154.3 Pressure gauges ........................................................................................... 154.4 Measures to be taken at the various warning thresholds .............................. 16

5 Voltage Detecting Systems VDS ....................................................175.1 Integrated Voltage Detecting System IVIS .................................................... 175.2 Pluggable voltage detection system .............................................................. 175.3 Phase comparators ....................................................................................... 18

6 Operation .........................................................................................196.2 Interlocks ....................................................................................................... 216.2.1 Internal mechanical interlocks of the panel .............................................. 216.2.2 Mechanical lock-out with cylinder lock (optional) ...................................... 216.2.3 Mechanical interlock with padlocks (optional) .......................................... 216.2.4 Electromagnetic interlocks ........................................................................ 226.3 Operating specifications ................................................................................ 236.4 Operation – Circuit-breaker ........................................................................... 246.4.1 Charging the circuit-breaker’s energy storing device ............................... 246.4.2 Switching operations on the circuit-breaker .............................................. 256.5 Operation - Switch disconnector panel ......................................................... 286.7 Standard switching operations in circuit-breaker panels ............................... 326.7.3 Connecting busbar sections with bus section coupler .............................. 336.8 Earthing the busbar ....................................................................................... 346.8.1 Earthing the busbar with earthing device on the cable connection

via the circuit-breaker of a feeder panel ................................................... 346.8.2 Earthing the busbar by means of the bus section coupler ........................ 35

7 Replacement of fuse links ..............................................................367.1 Selection data for H.V.H.R.C. fuse links ...................................................... 367.2 Approved suppliers for H.V.H.R.C. fuse links ................................................ 367.3 Dimensions for fuse links .............................................................................. 377.4 Use of non-specified fuse links ..................................................................... 377.5 Replacement of fuses ................................................................................... 37

8 Disconnecting the voltage transformer ........................................418.1 Disconnecting device for the voltage transformer in

the outgoing feeder cable .............................................................................. 418.2 Disconnecting device for voltage transformer on the busbar ........................ 42

Content

GMA

4 AGS 531 521-01 | Edition 03/20094

Content

9 Maintenance.....................................................................................439.1 Safety provisions ........................................................................................... 439.2 Maintenance schedule .................................................................................. 439.3 Cleaning ........................................................................................................ 449.4 Corrosion protection ...................................................................................... 449.5 Replacement of components and panels ...................................................... 449.6 Lubrication instructions ................................................................................. 45

10 Annex ...............................................................................................4710.1 Auxiliary products .......................................................................................... 4710.2 Operation accessories .................................................................................. 47

GMA

5AGS 531 521-01 | Edition 03/2009

Remarks on this manual

This Technical Manual cannot describe every imaginable individual case or every customer-specific version of the product. For information which is not included in this manual, please contact the manufacturer.As our products are subject to continuous further development, we reserve the right to make changes regarding the standards, illustrations and technical data described in this Technical Manual.All dimensions specified in this manual are in millimeters.

Purpose and target groupThis Technical Manual describes the operation of gas-insulated medium-voltage switchgear units of the GMA series.It is an integral part of the product and must be stored so that it is readily accessible at all times for and can be used by persons who are to work on the switchgear. If the switchgear is sold to new owners, they must receive this document along with the switchgear.This Technical Manual is exclusively intended for specialist electricians who have been certified for the GMA series (training certificate).

Reference documentsThe following additional documents must be complied with:

■ purchase agreement with the stipulations regarding the switchgear-specific equipment and the legal details

■ the appropriate switchgear-specific circuit diagrams / documentation ■ Assembly Instructions for GMA series (no. AGS 531 526-01) ■ the Operating Manuals of the devices installed in the switchgear (e.g. IVIS,

devices in low-voltage compartment) ■ the Switchgear Configuration “GMA” ■ the Technical Manual for the use and handling of the insulating gas sulphur

hexafluoride SF6 (no. AGS 535 051-01) ■ Selection lists for H.V.H.R.C. fuses of approved suppliers can be provided on

request.

Terms and symbols usedThis manual uses certain terms and symbols. They warn about dangers or provide important information which must be complied with in order to avoid danger to per-sons and damage to equipment:

"Danger!" This danger symbol warns about dangerous electrical voltage. Contact with voltage may result in fatal injury!

"Warning!" This danger symbol warns about the risk of injury. Please comply with all the provisions identified by this symbol in order to avoid death or serious injury.

"Important:" This instruction symbol is used for information which is important to avoid material damage.

Any questions or suggestions?Do you have any questions or suggestions regarding this manual, or do you require further information?We always strive to provide you with the best-possible information for optimum, safe use of our products. Thus, do not hesitate to contact us if you have any recommen-dations, amendments or proposals for improvement.

GMA

6 AGS 531 521-01 | Edition 03/2009

1 Safety provisions

The work described in this manual may only be performed by specialist electricians who have proved their experience with the GMA series (training certificate) and the applicable safety provisions.

■ Common regulations for high-voltage switchgear and control gear: IEC 62271-1

■ Use and handling of sulphur hexafluoride (SF6) in high-voltage switchgear: IEC 62271-303

■ The locally applicable accident prevention, operating and work instructions must be complied with.

■ Installation: IEC 61936-1/HD 637 S11

■ Operation of electrical equipment: EN 50110-11

1 The national standards applicable in the country where the equipment is to be installed must be complied with.

Before performing work on the panel, it is essential that you comply with the following instructions:

Danger!Before starting work on high-voltage components, de-energize the system, verify it for zero voltage and earth the system in ac-cordance with the applicable safety rules pursuant to EN 50110-1.

Warning!After removal of covers, operator safety in accordance with IEC 62271-200 may be restricted if the appropriate part of the switch-gear unit has not been isolated from the power supply.

Danger!Before performing work in the drive area of the switchgear panels, switch off the supply voltage and prevent it from being switched ON again.

Warning!There is a risk of injury when working on the drive mechanism. Before commencing work, release the energy-storing device by – the OFF-ON-OFF (Open/Close/Open) operating sequence on the circuit-breaker– closing via the make-proof earthing switch.

For the case of an internal fault, the GMA switchgear features pressure relief ports which prevent the panels and the switchgear unit from bursting.In case of fire or of internal faults, toxic and caustic decomposition products may be produced. Comply with the locally applicable accident and safety provisions.In case of personal injury, take first-aid measures or cause them to be taken.

Applicable standards and regulations:

Behaviour in case of incidents or accidents

GMA

7AGS 531 521-01 | Edition 03/2009

2 Technical data

2.1 Nameplate

The type designation of the switchgear panels - refer to nameplate - specifies the essential technical data. The following example shows its composition: In case of queries and orders for spare parts, the following data on the nameplate must be specified:

■ Type designation ■ Serial number ■ Year of construction

GMA 12 – 25 - 04 TD137501-01

IEC 62271-200 12 75 28

1250 25

50 1

E1 M2 0.03 0.02 0.014

AFL 16kA 1s 1.3

110 V DC IR busbar 1250A Operating and Installation Instructions: 531521, 531526

1

2

2006 3

4

Fig. 1Nameplate on the operating cover (front side) of the switchgear panel1 Type designation2 Serial number3 Year of construction4 Technical data

2.2 Ratings of the GMA series

Rated voltage Ur kV 12 17.5 24Rated lightning impulse withstand voltage Up kV 75 95 125Rated power frequency withstand voltage Ud kV 28 38 50Rated normal current, busbar Ir max. A 1250Rated normal current, outgoing feeder panel Ir max. A 1250Rated peak withstand current Ip max. kA 63Rated short-circuit breaking current Isc max. kA 25Rated short-time current Ik max. kA 25 (3 s)Rated frequency fr Hz 50

Example GMA 12 - 25 - 04

Type GMA

Ratedvoltage12 kV

Rated short-time current25 kA (3 s)

Panelwidth450 mm

GMA

8 AGS 531 521-01 | Edition 03/20098

2 Technical data

2.3 Technical data for electrical control and operating devices

The panels have been designed on principle for manual operation. The drive mechanisms of the individual switching devices can be equipped, depen-ding on the specific customer’s model, with additional electrical control and operating devices. These are characterized in the switchgear-specific circuit diagram (see switchgear documentation).Component fitting options:

■ ffor charging the energy-storing device (closing spring) ■ actuation of the disconnector and earthing switch

■ Closing release (1 ea.) ■ Opening release (max. 2 ea.) ■ Secondary release (transformer-operated release) (max. 1 ea.) ■ Undervoltage release (1 ea.)

The maximum number of components fitted (shunt opening, secondary and under-voltage release) is 2 ea. per panel.

Blocking coils prevent the circuit breaker from being closed and opened via the pushbuttons “ON“ or “OFF“, as well as actuation of the interrogating slides of the disconnectors and earthing switches. In deenergized condition, blocking coils are always in “blocked” condition.

Auxiliary switches are always actuated directly by the switch shaft via an intermedia-te linkage. Their position always corresponds to that of the main contactsThe switching functions have been set in the factory according to the circuit diagram.

Rated supply voltage V DC AC24 48 60 110 220 120 230

Switching capacity A 8 4 3 2 1 10 10

Time factor T=L/R ms ≤ 20Rated short-time current 100 A for a duration of 30 msRated continuous current A 10

Overview of rated supply voltagesDirect voltage DC V 24 / 48 / 60 / 110 / 125 / 220Alternating voltage AC V 120 / 230

Motor

Release

Blocking coil

Auxiliary switch

GMA

9AGS 531 521-01 | Edition 03/2009 9

2 Technical data

Power consumption, solenoids and motor

Power consumptionDC

approx. [W]AC 50/60 Hz approx. [VA]

Closing release 160 160Opening release without auxiliary spring energy store

160 160

Opening release with auxiliary spring energy store

25 25

Undervoltage release 15 15Secondary release - 12Blocking coil 12 12Motor 200 - 250 200 - 250

Please enquire at the manufacturer’s for details of the motor’s starting current. The supply voltage data is required to this effect.

Times for releases and motorMinimum command time “OFF“ for release 160 W for release 25 W

ms ms

20 50

Minimum command time “ON“ ms 20Motor charging time for energy storing device s ≤ 12

2.4 Utilization in line with the intended purposeGas-insulated GMA medium-voltage switchgear units are exclusively intended for switching and distributing electrical energy. They may only be used in the scope of the specified standards and the switchgear-specific technical data. Any other utiliza-tion constitutes improper use and may result in dangers and damage.

The manufacturer shall not be held responsible for damage which occurs if ■ instructions in this Technical Manual are not complied with, ■ the switchgear is not operated according to its intended use (see above), ■ the switchgear is assembled, connected or operated improperly, ■ accessories or spare parts are used which have not been approved by the

manufacturer, ■ the switchgear is converted without the manufacturer’s approval, or if inadmissi-

ble parts are attached.No liability is accepted for parts provided by customers, e.g. current transformers.

Disclaimer of liability

GMA

10 AGS 531 521-01 | Edition 03/200910

2 Technical data

2.5 Applied standardsGMA switchgear units are

■ metal-enclosed ■ SF6-insulated ■ type-tested ■ tested for internal faults ■ dimensioned for indoor installation

Designation IEC standard EN standardSwitchgear IEC 62271-1

IEC 62271-200 EN 62271-200Internal arc classification (IAC) IEC 62271-200 EN 62271-200Circuit-breaker IEC 62271-100 EN 62271-100Earthing switch IEC 62271-102 EN 62271-102Disconnector IEC 62271-102 EN 62271-102Switch disconnector IEC 60265-1 EN 60265-1Switch fuse disconnector combination IEC 62271-105 EN 62271-105Current transformers IEC 60044-1 EN 60044-1Voltage transformers IEC 60044-2 EN 60044-2Voltage Detecting Systems IEC 61243-5 EN 61243-5Protection against acci¬dental contact, foreign bodies and water IEC 60529 EN 60529

Installation IEC 61936-1 HD 637 S1Operation of electrical equipment - EN 50110Insulating gas sulphur hexafluoride (SF6) IEC 60376 EN 60376Use and handling of sulphur hexafluoride (SF6 ) IEC 62271-303 –

Degrees of protection against accidental contact and foreign objects (accor-ding to IEC 60529)Main electric circuits IP 65

Drives IP 2X1

Low-voltage compartment IP 3X2

Cable compartment IP 3X1 optional IP 5X2 optional IP 52

GMA switchgear units meet the following standards and regulations:

GMA

11AGS 531 521-01 | Edition 03/2009 11

2 Technical data

2.6 Environmental and operating conditionsGMA is an indoor switchgear which may only be operated under normal operating conditions in acc. with IEC 62271-1 regulations.Operation under conditions deviating from these is only admissible upon consultati-on and with the approval of the manufacturer.

Ambient conditions (in accordance with IEC 62271-1)Temperature class “minus 5 indoors”1

Ambient temperature min./max ºC -5 / +401

Average value over 24 hours ºC ≤ 351

Average rel. air humidity: 24 hours / 1 month % ≤ 95/≤ 901

Installation altitude above sea-level m ≤ 10001

1 higher values available on request

2.7 Disposal after the end of the service lifeA material and recycling data sheet can be provided on request for the disposal of series GMA switchgear at the end of its service life:Disposal is performed as a service by the manufacturer’s Service Center which is subject to a fee.The operating equipment contains the fluorinated greenhouse gas SF6 mentioned in the Kyoto protocol with a global warming potential (GWP) of 22 200.SF6 must be recovered and must not be released into the atmosphere. When using and handling SF6, comply with the specifications in the standard IEC 62271 High-Voltage Switchgear and Controlgear – Part 303 Use and Handling of Sulphur Hexafluoride (SF6).

GMA

12 AGS 531 521-01 | Edition 03/2009

3 Variants overview

3.1 Circuit-breaker panel GMA

Fig. 2Circuit-breaker panel with current and voltage transformers, panel width 600 mm1 Busbar connectors (in the coupling

tank / end tank), shown: right-hand side; left-hand side analogous

2 Circuit-breaker3 Toroidal-core current transformer4 Disconnecting device for voltage

transformer (optional)5 Voltage transformer (optional)6 Adjustable cable supports

7 Earthing link bar8 Cable compartment cover9 Cable connection three-fold com-

bination10 Manual operator interface11 Instrument niche12 Voltage detection systems13 Pressure gauge (temperature-

compensated)

14 Low-voltage compartment with control device

15 Busbar16 Disconnector17 Earthing switch

GMA

13AGS 531 521-01 | Edition 03/2009 13

3 Variants overview

3.2 Basic switchgear panels

Fig. 3Switchgear panel with circuit-breaker

Fig. 4Switchgear panel with circuit-breaker, voltage transformer, double cable connection

Fig. 5Switchgear panel with switch disconnector

Fig. 6Switchgear panel with switch fuse combination

GMA

14 AGS 531 521-01 | Edition 03/2009

4 Insulating gas monitoring

4.1 Gas compartment diagramA complete insulating gas compartment always consists of the following functional units:

■ Module comprising 1 to 4 panels ■ if applicable, one busbar connection tank, located at the right end of each

module ■ if applicable, busbar termination compartment (left-hand or right-hand)

1

2

3

4

5

6

7 8

9

10

Fig. 73 single panels, showing all function and control elements regarding the gas com-partment as an example These have been shown in graded grey shades to reflect the various insulating gas compartments. 1 Switchgear panel2 Busbar coupling tank3 Gas connector socket4 Check valve5 Pressure gauge6 Gas-proof electrical bushing7 Vave open (code 2)8 Vave closed (code 0)9 Pressure relief port10 Busbar end tank

GMA

15AGS 531 521-01 | Edition 03/2009 15


4.2 Technical dataType of insulating gas: Sulphur hexafluoride SF6 according to IEC 60376.The tanks of the switchgear have been designed as “Sealed Pressure System“ as defined in IEC 62271-200. Thanks to the design of the “Sealed Pressure System”, the insulating gas contents do not require any maintenance.During the expected service life, no gas handling will be required under normal ope-rating conditions acc. to IEC 62271-1.

Important:The switchgear-specific gas compartment diagram must be complied with.

Rated pressure and pick-up values1

(Rated voltage Ur = 12/24 kV)Rated pressure pre MPa 0,03Prealarm in case of drop in pressure pae MPa 0,02Main alarm in case of drop in pressure MPa 0,01

1 The pressure data refers to +20°C and an atmospheric pressure of 101.3 kPa abs.

4.3 Pressure gaugesThe pressure gauge indication is ambient temperature-compensated.The pressure indication remains constant if the operating mode remains unchanged, even if the temperature in the switchgear room changes.

■ Pressure gauge without remote signalling contacts (Fig. 8) ■ Pressure gauge with remote signalling contacts (Fig. 9)

12

4

3

Fig. 8Pressure gauge without remote signal-ling contacts1 Pointer2 Pointer in the green area (Ready

for operation)3 Pointer in the yellow area (Preal-

arm)4 Pointer in the red area (Main

alarm)

1 34 2

Fig. 9Pressure gauge with remote signalling contacts1 Pointer2 Pointer in the green area (Ready

for operation)3 Pointer in the yellow area (Preal-

arm)4 Pointer in the red area (Main

alarm)

Electrical sig-nalling contact

Switching function: closes in case of a drop in pressure, if

1 ... prealarm is reached2 ... main alarm is reached

Variants

GMA

16 AGS 531 521-01 | Edition 03/200916


4.4 Measures to be taken at the various warning thresholds

Warning!If a main warning occurs, switch disconnectors must no longer be actuated. As the switch disconnector requires a minimum gas density for correct functioning, actuation might result in damage to equipment and injury of persons.

Pressure gauge display

Activities

Prealarm “yellow” – Top up insulating gas and observe the system to see if the prealarm reoccurs

– Plan ahead for shut-off – Contact Service-Center

Main alarm “red” – Isolate module/single panel from power supply – Do not actuate switch disconnector any longer – ContactService-Center

GMA

17AGS 531 521-01 | Edition 03/2009

5 Voltage Detecting Systems VDS

5.1 Integrated Voltage Detecting System IVISIVIS is an integrated voltage detecting system with an integrated display unit used to determine zero voltage/system voltage according to IEC 61243-5.The IVIS system has been designed for maximum operating reliability.It does not require supply from an external source. It features climate-proof encapsulated electronics and is maintenance-free, due to permanent monitoring of the indication thresholds.Flash arrow symbols on the indicators display the mains voltage still existing within the defined response thresholds (Fig. 10).The IVIS system does not require the electrical repeat tests common for voltage detection systems.

Important:For a description of all functions and messages of the IVIS system, please refer to the separate Operating Manual “IVIS” (No. AGS 531 757-01).

5.2 Pluggable voltage detection systemThe system voltage or the zero voltage state of the outgoing feeders is detected via a separate voltage detection system according to IEC 61243-5.Socket-contacts for the indicators are located in the instrument-recess below the low-voltage compartment.Capacitive voltage presence indicating systems of all the approved manufacturers can be used.

Important:Comply with the manufacturer’s Operating Manual of the voltage indi-cators used.All three phases L1, L2 and L3 must always be checked together.Close non-used socket-contacts using a cap.

Fig. 11Voltage indicator unit (HR-ST)Manufacturer: Horstmann GmbH

Fig. 10IVIS display. The IVIS display is located in the instrument recess below the low-voltage compartment.

Fig. 12Socket-contacts for HR system

GMA

18 AGS 531 521-01 | Edition 03/200918

5 Voltage Detecting Systems VDS

5.3 Phase comparators

Important:Before connecting live switchgear components for the first time, always check phase coincidence.

If IVIS is used, phase comparison can be performed by means of the phase compa-rator MS 100 (Fig. 13, ref. no. AGS C26320-01).Phase comparators are optionally available and not included in the scope of sup-plies.

Fig. 13Phase comparator MS 100

GMA

19AGS 531 521-01 | Edition 03/2009

6 Operation

6.1 Operator interfaces for manual operation

1

2

3

45

6

78 9

10

11

12

13

14

Fig. 14Operator interface “Circuit-breaker”1 Nameplate2 Opening for operation of the disconnector3 Position indicator of disconnector4 Circuit-breaker position indicator DISCHARGED / CHARGED5 Circuit-breaker switch position indicator6 Circuit-breaker OFF pushbutton7 Circuit-breaker ON pushbutton8 Circuit-breaker operations counter9 Insertion port for mechanical charging of the circuit-breaker’s energy storing device10 Unlocking slide for cable compartment cover11 Position indicator of earthing switch12 Insertion port for operation of the earthing switch13 Mechanical interrogation interlock of insertion ports (interrogation slide)14 Mechanical lockout mechanism with lock (optional)

GMA

20 AGS 531 521-01 | Edition 03/200920

6 Operation

1

2

3

45

6

7

8

1

23

45

6

7

8

9

Fig. 15Operator interface “Switch disconnector”

Fig. 16Operator interface “Switch disconnec¬tor with fuse”

1 Nameplate2 Position indicator of switch discon-

nector3 Opening for operation of the

switch disconnector4 Mechanical interrogation interlock

of insertion ports (interrogation slide)

5 Unlocking slide for cable compart-ment cover

6 Position indicator of earthing switch

7 7Insertion port for operation of the earthing switch

8 Mechanical lockout mechanism with lock (optional)

1 Nameplate2 Position indicator of disconnector3 Opening for operation of the dis-

connector4 Indication of fuse tripping

(H.V.H.R.C. fuses) green: no fuse tripped red H.V.H.R.C. fuse tripped

5 Unlocking slide for cable compart-ment cover

6 Position indicator of earthing switch

7 Insertion port for operation of the earthing switch

8 Mechanical interrogation interlock of insertion ports (interrogation slide)

9 Mechanical lockout mechanism with lock (optional)

GMA

21AGS 531 521-01 | Edition 03/2009 21

6 Operation

6.2 Interlocks

Warning!Complete switchgear interlocking can only be ensured with com-plete locking devices.

Important:Please note the purchase contract and the switchgear-specific circuit diagram as regards the design of the interlocking systematics.

6.2.1 Internal mechanical interlocks of the panel ■ With the circuit-breaker closed, the interrogation slide is locked for the discon-

nector and the earthing switch. ■ The interrogation slide always releases one insertion port (disconnector or

earthing switch), or both of them are locked. ■ The lever for the disconnector can only be removed in its end position. ■ When the lever for actuation of the disconnector or earthing switch has not

been removed, or if the interrogation slide is open, the following components are locked: – ON pushbutton of the circuit-breaker cannot be pressed – ON pulse is interrupted.

6.2.2 Mechanical lock-out with cylinder lock (optional, see also Fig. 16 to Fig. 18)

Turn key Key Actuations on front control panel

clockwise removable actuation not possible *counter-clockwise not removable actuation possible

* In the case of branch-circuit panels, the circuit-breaker button “OFF” can be actua-ted.

If the lever for actuation of the disconnector or earthing switch has not been remo-ved, the key of the mechanical lock-out can neither be turned nor removed.

6.2.3 Mechanical interlock with padlocks (optional)On request, circuit breakers, disconnectors and earthing switches can be equipped with padlocks to prevent mechanical actuation (Fig. 17).

1 2

Fig. 171 Interlock flaps for ON/OFF pushbutton2 Insertion port for earthing switch blocked (disconnector analogous)

GMA

22 AGS 531 521-01 | Edition 03/200922

6 Operation

6.2.4 Electromagnetic interlocksElectromagnetic blocking coils can be used for inter-panel as well as intra-panel interlocks:

■ The insertion openings for disconnector and earthing switch by the interrogation slide are prevented from being released.

■ The circuit-breaker’s ON and OFF pushbuttons are blocked.

Important: – If no blocking coils are being used for the locking devices, a me-

chanical lock-out with cylinder or U lock must be provided. – In case of failure of the supply voltage, all electrical interlocks are

in their “locked” position. Measure: Re-establish supply voltage.

Blocking coil required, if ... Interlock function... motor drive on disconnec-tor

ON pushbutton of circuit-breaker

... bus section coupler in switchgear

Bus section coupler: – ON / OFF pushbutton of circuit-breaker – Interrogation slide for earthing switch in

circuit-breaker panel – Interrogation slide for disconnector and

earthing switch in bus riser panelall disconnectors in the outgoing feeder panels or additional couplers

ON

blocking coil

left busbar section right busbar section

OFF

Fig. 18Blocking coil interlocks in GMA switchgear with bus section coupler

1 2

Fig. 19Blocking coils in a circuit-breaker panel1 Blocking coil on ON pushbutton of circuit-breaker2 Blocking coil on interrogation slide

GMA

23AGS 531 521-01 | Edition 03/2009 23

6 Operation

6.2.5 Table of mechanical interlocks

Switchgear panel with circuit-breaker, disconnector and earthing switch

Switching device/component

State Interlock state versus …Circuit-breaker

Disconnector Earthing switch Cable compartment cover

Circuit-breaker

ON – locked

unlocked, if disconnec-tor OFF

unlocked, if earthing switch ON

locked, if disconnector ON

locked, if earthing switch OFF

OFF –

locked, if earthing switch ON

unlocked, if disconnec-tor OFF

unlocked, if earthing switch ON

unlocked, if earthing switch OFF

unlocked, if disconnec-tor ON

locked, if earthing switch OFF

DisconnectorON unlocked – locked locked, if earthing

switch OFF

OFF unlocked – unlocked locked, if earthing switch OFF

Earthing switchON unlocked locked – unlockedOFF unlocked unlocked – locked

Cable compart-ment cover

removed unlocked locked –

attached – – unlocked, if disconnec-tor OFF –

Switchgear panel with switch disconnector, earthing switch and disconnector with fuse, earthing switch

Switching device/component

State Interlock state versus …Switch disconnector Earthing switch Cable compartment or

fuse cover

Switch discon-nector

ON – locked locked if earthing switch OFF

OFF – unlocked locked if earthing switch OFF

Earthing switchON locked – unlockedOFF unlocked – locked

Cable compart-ment or fuse cover

removed locked locked –

attached unlocked if switch discon-nector OFF

unlocked if switch discon-nector OFF –

6.3 Operating specifications ■ The switchgear unit may only be operated by specialist electricians who have

proven experience in conjunction with the GMA series (training certificate) and the EN 50110-1 standard.

■ Check that the supply voltage is ON. ■ The switchgear can also be actuated manually using the actuating lever/crank.

Important:These accessories are supplied together with the panel. The panel may only be operated by means of these accessories (see page 47).

■ After each switching operation for which you have used an actuating lever/a crank, remove the actuating lever and store it in the tool board.

GMA

24 AGS 531 521-01 | Edition 03/200924

6 Operation

Warning!The ON - OFF movements need to be fully completed (to their stop).Never let off detachable lever before the switching operation has been completed. Risk of injury as the lever might rebound if it is not actuated to its mechanical stop.

Important: ■ While the supply voltage is not available, an undervoltage release

(optional) has dropped out. ■ Comply with interlocking conditions in Chapter 6.2

6.4 Operation – Circuit-breaker6.4.1 Charging the circuit-breaker’s energy storing deviceInitial position:

■ Circuit-breaker “OFF” ■ Energy storing device “released”

The energy storing device is charged automatically, as soon as the supply voltage is available.The position indicator of the energy storing device indicates the “charged” condition.

1. Insert crank.2. Move crank clockwise until “charged” is indicated by the position indicator.If the

motor starts during this process, this does not constitute a risk.3. Remove crank and keep it in a safe place.

charge

1

Fig. 20Charge the circuit-breaker’s energy storing device (closing spring) manually 1 Energy storing device charged

Charging by means of a motor

Manual charging

GMA

25AGS 531 521-01 | Edition 03/2009 25

6 Operation

6.4.2 Switching operations on the circuit-breaker ■ Push the ON button ■ Actuate closing release.

The energy storing device indicates “released”. The position indicated by the switch position indicator is “ON”.

Important:The energy storing device can be charged again immediately (manu-ally) after ON actuation. When the supply voltage is on, the energy storing device is charged automatically via the motor.

■ Push “OFF“ button or ■ Actuate opening release or ■ by secondary release or undervoltage release

Position indicator indicates the “OFF” position.

ONOFF

Fig. 21Circuit-breaker. Switching ON/OFF.

6.4.3 Position indicators on circuit-breaker and possible operating sequences

Pos. Position indicator Energy-storing device (closing spring)

Position indicator Circuit-breaker

Opening spring Possible operating sequence

1 released OFF released none

2 charged OFF released, is charged via C C–O

3 released ON charged O

4 charged ON charged, is re-charged via C O–C–O

C = ON (Close) O = OFF (Open)

Switching ON (Closing)

Switching OFF (Opening)

GMA

26 AGS 531 521-01 | Edition 03/200926

6 Operation

Switching operations on the disconnector

Important:Motor drive on disconnector (optional): During actuation of the interro-gation slide or while the actuating lever is inserted, the motor circuit is interrupted. For emergency manual actuation moving the detachable lever into ON position, first a short pressure must be exercised in OFF position (to overcome the dead center in the drive linkage), and vice versa.

Initial situation: ■ Circuit-breaker OFF ■ Disconnector OFF ■ Earthing switch OFF

1. Actuate interrogating lever to the right to release the appropriate insertion port.2. Insert actuating lever and move it clockwise3. Remove crank

1. Push interrogating lever to the right to release the appropriate insertion port2. Insert actuating lever and move it counter-clockwise.3. Remove crank.

1

ON OFF

Fig. 22Disconnector. Switching ON/OFF.

Switching ON manually:

Switching OFF manually:

GMA

27AGS 531 521-01 | Edition 03/2009 27

6 Operation

Switching operations on the earthing switch

Important:Motor drive on earthing switch (optional): During actuation of the inter-rogation slide or while the actuating lever is inserted, the motor circuit is interrupted. For emergency manual actuation moving the detachable lever into ON position, first a short pressure must be exercised in OFF position (to overcome the dead center in the drive linkage), and vice versa.

Initial situation: ■ Circuit-breaker OFF ■ Disconnector OFF ■ Earthing switch OFF

1. Actuate interrogating lever to the left to release the appropriate insertion port.2. Insert actuating lever and move it clockwise3. Remove actuating lever

1. Actuate interrogating lever to the left to release the appropriate insertion port2. Insert actuating lever and move it counter-clockwise.3. Remove actuating lever.

1

ON OFF

Fig. 23Earthing switch. Switching ON/OFF.



GMA

28 AGS 531 521-01 | Edition 03/200928

6 Operation

6.5 Operation - Switch disconnector panelSwitching operations on the switch disconnector

Warning!If the main alarm of the pressure gauge is issued, the switch dis-connector must not be operated.

Important:Motor drive on switch disconnector (optional): During actuation of the interrogation slide or while the actuating lever is inserted, the motor circuit is interrupted. For emergency manual actuation moving the detachable lever into ON position, first a short pressure must be exercised in OFF position (to overcome the dead center in the drive linkage), and vice versa.

1. Actuate interrogating lever to the right to release the appropriate insertion port.2. Insert actuating lever and move it clockwise3. Remove lever.

1. Push interrogating lever to the right to release the appropriate insertion port.2. Insert actuating lever and move it counter-clockwise.3. Remove lever.

ON OFF

Fig. 24Switch disconnector. Switching ON/OFF.



GMA

29AGS 531 521-01 | Edition 03/2009 29

6 Operation


Initial situation: ■ Switch disconnector OFF ■ Earthing switch OFF

1. Actuate interrogating lever to the left to release the appropriate insertion port.2. Insert actuating lever and move it clockwise.3. Remove actuating lever.

1. Actuate interrogating lever to the left to release the appropriate insertion port.2. Insert actuating lever and move it counter-clockwise.3. Remove actuating lever.

ON OFF




GMA

30 AGS 531 521-01 | Edition 03/200930

6 Operation

6.6 Operation - switch disconnector panel with fusesSwitching operations on the switch disconnector

Warning!If the main alarm of the pressure gauge is issued, the switch dis-connector must not be operated.

1. Actuate interrogating lever to the right to release the appropriate insertion port.2. Actuate detachable lever speedily to the left until the breaker mechanism has

latched (approx. 95°) (thus, the opening spring is charged). Subsequently, actuate detachable lever speedily to the right (approx. 115°) until closing is complete (at the same time, the closing spring is charged and set free).

3. Remove detachable lever immediately afterwards.

1. Push interrogating lever to the right to release the appropriate insertion port2. Insert detachable lever.3. Actuate detachable lever speedily to the left (approx. 20°) until opening is

complete.

OFF

ON

charge

Fig. 26Switch disconnector. Switching ON/OFF and charging.



GMA

31AGS 531 521-01 | Edition 03/2009 31

6 Operation


Initial situation: ■ Switch disconnector OFF ■ Earthing switch OFF

1. Actuate interrogating lever to the left to release the appropriate insertion port.2. Insert actuating lever (red) and turn it clockwise (approx. 95°).3. Remove actuating lever.

1. Actuate interrogating lever to the left to release the appropriate insertion port2. Insert actuating lever and move it counter-clockwise.3. Remove actuating lever.

ON OFF




GMA

32 AGS 531 521-01 | Edition 03/200932

6 Operation

6.7 Standard switching operations in circuit-breaker panels

Important:For all switching operations, comply with the interlocking conditions (Chapter 6.2) and the operating specifications in Chapter 6.3.

6.7.1 Operating the outgoing feeder cable

6.7.2 Earthing outgoing feeder cable

A

C

A

B

Fig. 28

Initial situation – Circuit-breaker OFF – Disconnector OFF – Earthing switch OFF

Fig. 29

Switch outgoing feeder cable ON1. Switch disconnector ON (A).2. Switch circuit-breaker ON (B).

Fig. 30

Switch outgoing feeder cable OFF

1. Switch circuit-breaker OFF (C).2. Switch disconnector OFF (A).

DD

Fig. 31

Initial situation– Circuit-breaker OFF– Disconnector OFF– Earthing switch OFF

Fig. 32

Earth outgoing feeder cableSwitch earthing switch ON (D).

Fig. 33

De-earthSwitch earthing switch OFF (D).

GMA

33AGS 531 521-01 | Edition 03/2009 33

6 Operation

6.7.3 Connecting busbar sections with bus section coupler

Initial situation ■ Circuit-breaker OFF ■ Disconnector OFF ■ Earthing switch OFF

Fig. 34Initial situation

Connecting busbar sections1. Switch both disconnectors (A) and (B) ON.2. Switch circuit-breaker (C) ON.

C AD B

Fig. 35Connect/disconnect busbar sections

Disconnect busbar sections1. Switch circuit-breaker (D) OFF.2. Switch both disconnectors (A) and (B) OFF.

L R

L R

GMA

34 AGS 531 521-01 | Edition 03/200934

6 Operation

6.8 Earthing the busbar

Warning!The disconnectors in the busbar section to be earthed must be in position “OFF” to avoid fauly switching.

Important:For all switching operations, comply with the interlocking conditions (Chapter 6.2) and the operating specifications in Chapter 6.3.

6.8.1 Earthing the busbar with earthing device on the cable connection via the circuit-breaker of a feeder panel

The earthing device can be connected to the cable connectors in the cable connec-tion area (earthing adapter required). The earthing device and the earthing adapter are not included in the switchgear’s scope of supplies.

Important:Comply with the manufacturer’s information regarding the earthing device and the earthing adapter.

Fig. 36

Initial situation – Feeder

“EARTHED”

Fig. 37

Connecting the earthing device1. Mount earthing adapter to cable connection.2. Connect the earthing device.

AB

CD

Fig. 38

Earthing the busbar1. Switch earthing switch OFF (A).2. Switch disconnector (B) ON.3. Switch circuit-breaker (C) ON.

De-earthing busbar(See Fig. 39)1. Switch circuit-breaker OFF (D).2. Switch disconnector (B) OFF.3. Switch earthing switch (A) ON.4. Remove earthing device and earthing adapter.5. Connect high-voltage cable to cable connection in surge-proof condition.

GMA

35AGS 531 521-01 | Edition 03/2009 35

6 Operation

6.8.2 Earthing the busbar by means of the bus section coupler

Initial situation:Circuit-breaker OFFBoth disconnectors OFFBoth earthing switches OFF

Earth left-hand busbar section (L)1. Switch disconnector - left-hand panel - (A) ON.2. Switch circuit-breaker - left-hand panel - (B) ON.3. Switch earthing switch - right-hand panel - (C) ON.

A

BD

C

Fig. 39Earthing/de-earthing left-hand busbar section

De-earthing left-hand busbar section(See Fig. 39)1. Switch earthing switch - right-hand panel - (C) OFF.2. Switch circuit-breaker - left-hand panel - (B) OFF.3. Switch disconnector - left-hand panel - (A) OFF.

Earthing right-hand busbar section (R)1. Switch disconnector - right-hand panel - (F) ON.2. Switch earthing switch - left-hand panel - (E) ON.

E F

Fig. 40Earthing/de-earthing right-hand busbar section

De-earthing right-hand busbar section(See Fig. 40)1. Switch earthing switch - left-hand panel - (E) OFF.2. Switch disconnector - right-hand panel - (F) OFF.

L R

L R

L R

GMA

36 AGS 531 521-01 | Edition 03/2009

7 Replacement of fuse links

7.1 Selection data for H.V.H.R.C. fuse links For the protection of distribution transformers, exclusively H.V.H.R.C. backup fuse links with integrated temperature limiter may be used for gas-insulated GMA switch-gear.Due to the temperature limiter, in case of overload of the H.V.H.R.C. fuse links in the presence of

■ inadmissible overload currents, ■ H.V.H.R.C. fuse links damaged previously

there will be a shut-off by the switch disconnector.This prevents thermal overloading of the fuse carrier.

The following data must be specified in the Purchase Order: ■ Transformer rated power ■ Transformer operating voltage ■ Rated current of the selected H.V.H.R.C. fuse links.

Selection lists of approved suppliers for H.V.H.R.C. fuses can be provided as requi-red. These selection lists take the following standards and regulations into account:

■ Protection of distribution transformers in accordance with IEC 60787, VDE 0670, part 402

■ Fuse links in acc. with IEC 60282-1 or DIN 43625 (striker type “medium” with mit max. initial tripping force of 80 N)

■ Specifications of IEC 62271-105 ■ Max. ambient temperature for switchgear: 40 ºC according to

IEC 62271-1, identical with max. ambient temperature for the switchgear within the housing of a packaged substation in accordance with IEC 62271-202.

■ No transformer operation during an overload condition ■ Temperature-rise limits within the switchgear enclosure

7.2 Approved suppliers for H.V.H.R.C. fuse linksThe following series made by the H.V.H.R.C. fuse link suppliers offering integrated striker tripping with temperature limiter feature are admissible:

Series SupplierH.V.H.R.C. fuse links with temperature limiter SIBAH.V.H.R.C. backup fuses with overload protection (temperature limiter)

EFEN

H.V.H.R.C. fuse links, type IKUS, with thermo-striker JEAN MÜLLER

Ordering data

Selection lists and applicable standards

GMA

37AGS 531 521-01 | Edition 03/2009 37


7.3 Dimensions for fuse linksThe GMA switch disconnector panel with fuses has been designed for the following dimensions “D” or “e” of the fuse links:

Type designation Dimensions “D” or “e” in mmGMA/12-2/... with adapter 24 kV 292GMA/24-2/... 442

ø45±

1

ø88

max

.ø5

0 m

in.

ø88

max

.

33+2

ø20m

ax.

38max.

strikerpin

33+2

“D” or “e”

dimensions in mm

Fig. 41Dimensions of fuse links

7.4 Use of non-specified fuse links

Warning!Only H.V.H.R.C. fuse links in accordance with the selection lists have been approved for GMA switchgear panels. It is essential to consult the switchgear manufacturer before using non-specified fuse links or fuse links made by other manufactur-ers.

The company operating the switchgear shall be solely responsible for the use of fuse links which are not defined in the selection lists.H.v. General-purpose fuses are recommended for the exceptional case in which the switch disconnector is to be equipped with a snap-action drive SFU (instead of stored-energy mechanism SF), so that all-pole fuse tripping is impossible.

7.5 Replacement of fuses

Warning!Fuse links may be hot! Wear protective gloves. .

Important:As the earthing switches are arranged upstream and downstream of the fuses, the fuses can be replaced without using insulating equip-ment.

The fuse symbol on the operator interface indicates mechanically if one of the fuses has melted (red marking, Fig. 46, item 1). The switch disconnector is switched OFF automatically by the fuse tripping.

H.v. General-purpose fuses

GMA

38 AGS 531 521-01 | Edition 03/200938


If the transformer outgoing feeder is designed without an all-pole fuse tripping, this feature is indicated by an information sign. This sign is located near the fuse symbol on the operator interface.

Important:Melting of the fuse does not trip the switch disconnector.

In this case, the switch disconnector is equipped with a snap-action drive (SFU) and must be switched OFF separately (manually or electrically, depending on design).GMA switchgear with a rated voltage of 24 kV may also be operated with an ope-rating voltage of 12 kV. An adapter is available to enable the use of an H.V.H.R.C. fuse link with the standard dimension for 12 kV, dimension “e”=292 mm for a fuse dimension of “e”=442 mm.The fuse links are not included in the scope of supply.

1. Clean contact surfaces (brand-new fuse link, adapter and grip end) using a non-fibrous cloth, in case of severe soiling, use a cleaning product. Apply a thin and uniform film of lubricant KL, clean and grease.

2. Introduce the brand-new fuse link with contact strip with striker into the grip end contact by turning it slightly. Secure fuse link from being removed by tightening clamping screw in the grip end. Fasten the adapter on the opposite contact end of the fuse link without striker.

Fig. 42Attachment of fuse link grip end

Fig. 43Lock “cam” on the grip end in the re-cess of the insulating tube

Fig. 44Assembly of short fuse links

Fig. 45Assembly of short fuse links

Transformer outgoing feeder without all-pole fuse tripping

Replacement of short fuse links in switchgear with a fuse dimension of e = 442 mm

Replacement of fuse kits:

GMA

39AGS 531 521-01 | Edition 03/2009 39


1. Switch the earthing switch ON.2. Unlock the fuse with cover and open compartment double-bit key.3. Fold fuse compartment cover forward and down, and remove it.4. Pull grip end with fuse link out without turning it.5. Remove grip end with fuse link using both hands.6. Release clamp screw in the grip end.7. Pull fuse link out of the grip end by turning it slightly.8. Prepare fuse link for insertion.

– Clean contact surfaces on the grip end and on the brand-new fuse link using a non-fibrous cloth, in case of severe soiling, use a cleaning product.

– Apply a thin and uniform coat of lubricant KL – Introduce the contact end with striker of the brand-new fuse link into the

contact of the grip end by turning it slightly. – Secure fuse link from being removed by tightening clampscrew in the grip

end.9. Push grip end with fuse link inwards without turning it.10. The “cam” on the grip end must engage in the recess of the insulating tube (see

Fig. 43).11. Reinsert fuse cover, close it using the double-bit key, and lock it. Press interlo-

cking slide (3) down.

1

2

4

5

3

Fig. 46Replacement of fuses1 Fuse tripping indicator (red)2 Earthing switch ON3 Unlock fuse cover4 Double-bit key for opening5 Fold fuse shutter forward, and

remove it

Fig. 47Removing the fuse link

Description of the steps for fuse replacement:

GMA

40 AGS 531 521-01 | Edition 03/200940


We recommend checking the all-pole mechanical fuse tripping with the switch disconnector in position “ON” after replacing the H.V.H.R.C. fuse links.The all-pole mechanical tripping can be checked via the tripping linkage using the tripping pin Ø ≤ 2.1 mm, L>80 mm, which is pushed as far as it will go through the insertion port of the fuse link cover.

Checking the all-pole mechanical fuse tripping

Fig. 48Checking the all-pole mechanical fuse tripping

GMA

41AGS 531 521-01 | Edition 03/2009

8 Disconnecting the voltage transformer

8.1 Disconnecting device for the voltage transformer in the outgoing feeder cable

Warning!Disconnecting devices for voltage transformers can only be actuated in de-energized condition. Make sure that the outgoing feeder cable is de-energized on all accounts.

Actuate disconnecting device:1. Isolate outgoing feeder cable from the power supply and earth it; see page 32.2. Remove cable compartment cover (see Assembly Instructions).3. Insert detachable lever for earthing switch (2) into its insertion opening.4. Pull the lock pin (1).5. Swing detachable lever (2) speedily as far as it will go (to its stop) to

I (ON) or O (earthed) position (approx. 95°).6. When end position is reached, the lock pin must latch again.7. Pull detachable lever off after switching operation.8. Insert and lock cable compartment cover (see Assembly Instructions).

Fig. 49Disconnecting device for voltage trans-former

1

2

Fig. 50Disconnecting device for voltage trans-former and insertion port.1 Lock pin2 Detachable lever

O (earthed) I (ON)Switch positions of the disconnecting device

GMA

42 AGS 531 521-01 | Edition 03/200942

8 Disconnecting the voltage transformer

8.2 Disconnecting device for voltage transformer on the busbar

Warning!Disconnecting devices for voltage transformers can only be actu-ated in de-energized condition. Make sure to isolate the busbar in any case from the power supply.

Actuate disconnecting device:1. Isolate busbar from the power supply.2. Remove cover from instrument recess.3. Insert detachable lever for earthing switch (2) into its insertion opening.4. Pull lock pin (1).5. Swing detachable lever (2) speedily as far as it will go (to its stop) to

I (ON) or O (earthed) position (approx. 95°). When end position is reached, the lock pin must latch again.

6. Check position indicator (O or I).7. Pull detachable lever off after switching operation.8. Remount cover of instrument recess.

Fig. 51Removing the cover from the instrument recess.

1

32

Fig. 52Switching the voltage transformer OFF1 Position indicator reads:

Voltage transformer OFF (O)2 Lock pin3 Detachable lever

1

32

Fig. 53Switching the voltage transformer ON1 Position indicator reads:

Voltage transformer ON (I)2 Lock pin3 Detachable lever

GMA

43AGS 531 521-01 | Edition 03/2009

9 Maintenance

9.1 Safety provisionsOnly specialist electricians certified by the manufacturer for maintenance work and who have the required knowledge regarding handling of GMA series medium-voltage switchgear are permitted to perform maintenance and cleaning work.

Warning!Refer to the safety provisions on page 6.

9.2 Maintenance scheduleWe recommend performing a visual inspection of the panels at least every four years, depending on the strain to which they are subjected during operation and on the operating conditions.

Important:In case of humidity and condensation or air pollution (dust, smoke or corrosive gases), the maintenance intervals must be adapted to the actual conditions. In case of ambiguities or irregularities, please contact the manufacturer’s Service Center immediately.

GMA series panels have a hermetically sealed pressure system in accordance with IEC 62271-200. It does not require servicing over its entire service life.

The components in the cladded high-voltage parts of the panel (vacuum circuit-brea-ker, disconnector and earthing switch) do not require any maintenance either.The pressure tanks are made of stainless, non-magnetic steel.

Warning!Neither drill holes into nor open gas tanks. Risk of loss of insula-ting gas.

Drive mechanisms and covers outside of the enclosure are corrosion-protected with lasting effect. Damage to the paint, scratches and deterioration must be repaired immediately to avoid corrosion.

Mantenance interval Work to be carried out Qualification / Work performed by

at least every 4 years or depending on the actual ambient conditions

– Visual inspection of the switchgear panels

– If necessary, clean the panels and perform switching tests of the drives (see page 44).

Staff certified accordingly for the work to be done

after 20 years – Grease drives and perform switching tests (see page 44).

– Check releases/blocking coils – once the max. admissible number of breaking

operations for the switching devices has been reached (see page 46)

– 1000 mechanical operations of the disconnector or the earthing switch

Please, contact the manufacturer

Manufacturer’s Service Center

Insulating gas:

Switching devices:

Gas tank:

Drive mechanisms / covers:

GMA

44 AGS 531 521-01 | Edition 03/200944

9 Maintenance

9.3 CleaningWhen deposited dirt and humidity are detected, the panels must be cleaned in an expert fashion.When performing cleaning, make sure that the lubrication in the drive mechanisms is not removed. If the drive mechanisms are no longer sufficiently lubricated, new lubrication must be applied.

Warning!Risk of injuries: The drives must not be disassembled for service and maintenance work.

Clean using a dry, lint-free cloth. Depending on the degree of soiling, replace cloth as often as necessary.

Use cleaning agent, 1 litre can (see page 47). The use of other cleaning agents is not admissible.

■ Wear protective gloves ■ Use cleaning agents according to manufacturer‘s instructions ■ Soak the cloth thoroughly and wipe the insulating components. Keep duration

of exposure as short as possible. ■ Expose the cleaned surface to the air for at least two hours.

9.4 Corrosion protectionDrive mechanisms and covers have a long-term protection against corrosion.Any damage to the paint, scratches and other damage must be repaired immediately to avoid corrosion.Contact the manufacturer’s Service Center.

9.5 Replacement of components and panelsThe drive mechanisms, current transformers and voltage transformers as well as the testing and monitoring systems can be replaced if necessary. Also, entire modules can be replaced.The following data on the nameplate are relevant for replacement of components or modules or in case of any queries (see also page 7):

■ Type designation ■ Serial number ■ Year of construction

Should you have any queries regarding replacement of components or panels, ple-ase contact the manufacturer’s Service Center.

Slight contamination

Severe soiling

GMA

45AGS 531 521-01 | Edition 03/2009 45

9 Maintenance

9.6 Lubrication instructionsMaintenance work may only be performed by specialists who are familiar with the installed switching devices and drive mechanisms they use.The switching devices and drives must not be disassembled for service and mainte-nance work.

Warning!Refer to the safety provisions on page 6.

The closing and opening springs must be released!

Once the operating cover has been removed, the drive is accessible from the switch-gear front end. Refer also to the Assembly Instructions.1. Remove the bolts (4 ea.) from the operating cover.2. Remove the operating cover by lifting it forward.Remount operating cover by reversing the above sequence once maintenance is finished.

The drive is completely lubricated at the factory with lubricant KL.All surfaces and joints in the circuit-breaker, disconnector and earthing switch drives which are sliding on each other must be lubricated.

Important:The following elements must not be lubricated:

■ Motor ■ Ball bearings ■ Auxiliary releases ■ Push switches ■ Blocking coils ■ Auxiliary switches

■ Lubricant KL for surfaces sliding on each other.Clean lubricating points, e. g. using a lint-free cloth or a soft paint-brush and cleaning agent (use sparingly, just moisten points of lubrication). Apply a thin coat of lubricant (using e.g. a paintbrush).

■ Liquid lubricant FL for bearings, joints and guide systems. Pour drops of liquid lubricant (oil can, drip feed lubricator) into the bearing gap. Liquid lubricant gets between the bearing surfaces due to the capillary effect. In case of inaccessible lubrication points, use an extension tube or spray.

Removing operating cover

Points of lubrication:

Lubrication procedure

GMA

46 AGS 531 521-01 | Edition 03/200946

9 Maintenance

9.7 Admissible number of breaking operations

n

30 000

10 000

1000

100

10

50

500

5000

I sc

Breaking current logNum

ber o

f bre

akin

g op

erat

ions

I r

aI

Fig. 54Circuit-breaker Ir = Rated (normal) current [A]Isc = Short-circuit breaking current [kA]The diagram defines exclusively the maximum admissible numbers of breaking operations of the circuit-breaker as a function of the rated normal current Ir and of the short-circuit breaking current Isc.The data for the rated normal current Ir and the short-circuit breaking current Isc are indicated on the nameplate.

10 10010

500

50

1 000

100

50

3 000

500

100063

0

nN

umbe

r of b

reak

ing

oper

atio

ns

aBreaking current I [A]

Fig. 55Switch disconnector without fuse.Rated normal current 630 A

10 10010

500

50

1 000

100

50

3 000

500

100020

0

nN

umbe

r of b

reak

ing

oper

atio

ns

aBreaking current I [A]

Fig. 56Transformer feeder with switch disconnector / fuse.Rated normal current 200 A

GMA 12 – 25 - 04 TD137501-01

IEC 62271-200 12 75 28

1250 25

50 1

E1 M2 0.03 0.02 0.014

AFL 16kA 1s 1.3

110 V DC IR busbar 1250A Operating and Installation Instructions: 531521, 531526

2006

GMA

47AGS 531 521-01 | Edition 03/2009

10 Annex

10.1 Auxiliary productsOnly the following auxiliary products may be used, which can be purchased from the manufacturer. The use of other auxiliary products is not admissible.

Warning!Risk of injury if the auxiliary products are handled improperly. Comply with the safety data sheets of the auxiliary products.

Auxiliary product Ref. no.Cleaning agent, 1-l can S 008152Lubricant KL, 0.5 kg can ST 312-111-835

Liquid lubricant FL 0.5-l can S 008 153

Touch-up pen RAL 7044 silk-grey, 50 ml S 009 561

Touch-up pen, special paint(specify colour shade) S 009 562

10.2 Operation accessories

Important:These accessories are supplied together with the panel. The panel may only be operated by means of these accessories.

Accessories Ref. no.Detachable lever for switch disconnector and disconnector AGS C26 267-01Detachable lever for earthing switch and voltage transfor-mer disconnecting device

AGS C01 133-01

Double-bit key for low-voltage compartment and for ope-ning/closing the fuse cover

AGS 434 101-01

Crank to charge the energy-storing device AGS 617 831-01

Tripping pin to check 3-pole fuse tripping AGS 085 562-01

Notes:

Schneider Electric35, rue Joseph MonierCS 3032392506 Rueil-Malmaison Cedex, France

RCS Nanterre 954 503 439Capital social 896 313 776 €www.schneider-electric.com AGS 531 521-01 | 03/2009

As our products are subject to continuous development, we reserve theright to make changes regarding the standards, illustrations and technicaldata described in this Technical Manual. For any requests, please contact the address given below.

Schneider Electric Sachsenwerk GmbHRathenaustrasse 2D-93055 Regensburg, Germany( +49 (0) 9 41 46 20-07 +49 (0) 9 41 46 20-418

© S

chne

ider

Ele

ctric

201

1 –

All

right

s re

serv

ed to

this

tech

nica

l man

ual.

Rep

rodu

ctio

n an

d m

akin

g av

aila

ble

of th

is te

chni

cal m

anua

l, or

ext

ract

s, to

third

par

ties

are

proh

ibite

d.

Onl

y in

tegr

al re

prod

uctio

n of

this

tech

nica

l man

ual i

s pe

rmitt

ed w

ith th

e w

ritte

n pe

rmis

sion

from

Sch

neid

er E

lect

ric. E

lect

roni

c co

pies

in e

.g. P

DF-

form

at o

r sca

nned

ver

sion

ha

ve th

e st

atus

“for

info

rmat

ion

only

” . T

he o

nly

valid

ver

sion

of t

his

tech

nica

l man

ual i

s al

way

s en

clos

ed d

irect

ly to

the

prod

uct i

n qu

estio

n by

the

fact

ory.

Download - Gas-Insulated Switchgear GMA

Top Related